snakes use their scales and body muscles to slowly move up the tree, inch by inch. this technique is inspiring researchers to create a robot that can slither through rubble like a snake. the robot would then be used in search-and-rescue missions. >> let's get your opinion in "speak of the week." >> do you think it's harder being a teen today than when your parents were teens? >> well, whenever my mom always tells me about, you know, how sometimes when i shirk my duties, i always tell her it was a lot simpler back in her day. >> it's probably a lot harder to be a teen today because there's so much more, like, social stuff going on with, like, the internet and stuff. >> no, i don't think that, because back then, times were harder than it is today. >> probably, because now there's a lot more distractions, like more technology and whatnot. >> from what they say, i think it is. i think there's just more that we're exposed to now than there was when we were before. so i think it is harder now. >> um...no. i'm gonna go with no, because, like, well, when my parents were tee